Boiler-feeding injector



B. T. W ILLISTON. BOILER FEEDING INJECTOR. APPLICATION FILED AUG I2 1919cal-ly 4 3 1 fim 4 SHEETSSHEET 2- ptvzz 1921.

7 20620607 Eel?) 572, ZUZZZcIStOiZ B. T. WILLISTON.

BOILER FEEDING INJEGTQR. APPLICATION FILED AUG. 12, 19I9- Patented Sept.27,

4- SHEETS SHEET 3.

Zz'stan WWUXM B. T. WILLISTON.

BOILER FEEDING INJECTOR.

APPucnion FILED AUG.12, 1919.

Patented Sept. 27, 1921..

4 SHEETS-SHEET 4.

a a I ww/ W hr UNITED STATES PATENT OFFICE.

MAXWELL AND MOORE, INC OF NEW JERSEY.

BELVIN 'r. WILLIs'roN, 0F SOMERVILLE, MASSACHUSETTS, AssrGNoR T0 MANNINGYon-K, N. Y AGORP R IQN on (NEW BOILER-FEEDING INJECTOR. I

Specification of Letters Patent. Patented Sept. 27, 1921.

Application" filed August 12, 1919. Serial No. 317,023.

To all to 7mmit 'may concern Be it known that I, BELvIN T. lVILLIsToN,citizen of the United States of America,and resident of Somervizlle, inthe county of Middlesex and State of Massachusetts, have invented newand useful Improvements in BoilerFeeding Injectors, of which the following is a specification.

My invention relates to injectors and more particularly to boilerfeeding injectors of the type used on locomotives.

In boiler feeding and other injectors it has been customary to provide aplurality of valves to control the forcer nozzle, the lifter nozzle, thewater inlet, the over flow, etc, and to regulate the flow ofwaterthrough the injector by operating a plurality'of these valvesconjunctively. This practice has involved more or less complicatedmechanisms and more or less inconvenience and diff culty in controllingthe action of the injectors. An object of the present invention is tosimplify the construction of injectors, to reduce the number of valvesand other parts and, to correlate the various parts so that the flow ofwater may be regulated from maximum to minimum by means of a singlevalve. 1 j

Moreover,in injectors which are subjected to low temperatures, as e. g.are locomotive injectors in cold weather, it is necessary to heat thewater standing in- ,the water supply hose or pipev leading to theinjector when the injector is'not in use in order to prevent the waterfrom freezing, and in thecase of locomotives it is. also-desirable toheat the water in the tender-in very cold weather. Another object. ofthe present invention, therefore. isto overcome the diflicultiesincident to injector systems, in which means is provided for heating thewater in advance of the injector when the injector is idle, or which areprovided withheating means of the unsatisfactory types heretoforeproposed, and to provide improved means for accomplishing this purposewhich, involves little if any additional mechanism and which may becontrolled with ease and certainty. v I

Furthermore, in boiler feeding injectors and other injectors where thecontrol levers or handles must necessarily be located at aconsiderable'distance from the valves which they control, (and inpractically all injector Systems this distance must be more or l ss"seat-ed due to the unavoidable locomotive injectors.

considerable), there is a pronounced tendency'for the valves not toremain tightly lost motion in the trains of linkage connecting thecontrol handles with the valves and also to the vibration which isparticularly troublesome in In the case of thethe steam valve, and ifdesired other of the valves, tightly seated when the injector is idlenotwithstanding lost motion in the control linkage and notwithstandingexcessive vibration. r I

Otherobjects will be apparent from the concreteembodiment of theinvention illustrated in the accompanying drawings in which 4 t r Figure1 is a right side elevation showing parts broken away; a

Fig. 2 is a left side elevation showing parts broken away; l-

Fig. 3 i sa rear elevation on an enlarged scale of a portion'of theinjector viewed fromthe right, of F ig. l, partsbeing sec tioned; and

Fig, 4: is a section on line 4-4 of Fig. 3;

Fig. 5 is a fragmentary cross section to enlarged scale illustrating thesteam inlet valve. I l l I The particular embodiment of my inventionchosen for the purpose of illustration comprises in general a maincasing C, a water inlet nipple W, a steam inlet S, ia'delivery nippleD,and an overflow nipple 0. Within the casing C (Fig. 4) is provided asteam valve Vs, awater valve Vw, and intermediate overflow valve V0, afinal overflowvalve V0", a forcer nozzleFN, a forcer tube FT, a lifternozzle LN, a lifter tube LT, etc. An annunciator or tell-tale T of anysuitable construction communicates with. the casing C at 26,. wherebywhen the injector breaks lsteam will issue therefrom to indicatethatfithe injector has ceased functioning, x 1 v a c The steam valve V3.is a double valve hav ,ing an upper portion 1 seating on a seat 2 perportion by a lost-motion connection comprising a pin 5 slidable in aspider 6 depending from the upper portion whereby the upper valve may beraised part way before the lower valve begins to open. The upper end ofvalve Vs is adapted to engage against face (Fig. 1) when the valve isopened for a purpose hereinafter described.

The upper valve 1 of the double steam valve V8 and its seat 2 areprovided with telescoping portions which prevent steam from passing thevalve until the valve has been opened a considerable amount; and in thespecific embodiment of the invention illustrated in the drawings valve 1is provided with a downwardly directed pistonlike extension 22 fittingfairly closelyinto the opening in the valve seat but having sufficientfreedom in said opening to permit the bleeding of steam thereby. Thepiston 22 extends downwardly to the plane 23 and the spider 6 extendsdownwardly from the lower end of the piston to guide the valve and tosupport the lower valve 8. A groove 24 may be provided at thejunction-of the spider with the piston; When the valve Vs is lifted asmall and predetermined quantity of steam may bleed past the piston 22until the latter is completely withdrawn from the opening in the valveseat 2. r

The water valve Vw is also a double valve comprising an upper portion 10rotatably mounted by threads 11 and a lower portion 8 tQlGSCOPiHg intothe upper portion with a sliding fit. The lower valve 8 has a flangeseating on seat 9 and this flange has four openings 13 extendingtherethrough. 'The upper valve 10 has a flange seating on the flange ofthe lower portion 8 over the openings 13. The upper valve 10 isrotatably supported by threads 11 engaging an internally threadedholder, said threads having such a high pitch that the valve may beopened by a single turn of the rod 12. The lower valve 8 rises with theupper valve if the pressure beneath the valve is greater than abovewhereas if the pressure above is substantially greater than below thevalve 8 remainsseated when the valve 10-is raised thereby uncoveringopenings '13. I 1 In a locomotive injector system the control handlesare located in the caband conse quently the control handles Cs Cw andCo, for the steam, water and overflowuvalves respectively are connectedto the respective valves through trainsof linkage. The handle Cs isconnected 'to the steam valve Vs through the medium of a bowed rodfl l,a

member 15 and the rod 7 extending inside casing C. The member 15 i ispivotally mounted on the casing by means of side straps 16 pivoted at16, Thehandle (3w is connected to the water valve through a series ofshafts and universal joints 17 and 11". The handle C0 is connected tothe final overflow valve V0 through a similar series of shafts anduniversal joints 18 and 18.

A feature of the invention consists in the combination of the bowed link14 inthe linkage connecting the steam valve with its con trol handle.This bowed link is made of steel having sufficient resiliency to flexwhen the valve is pressed against its seat and to maintain the valvetightly seated notwithstanding lost motion in the linkage andnotwithstanding heavy vibration. By using a bowed resilient rod in thecontrol linkage the steam valve is maintained tightly seated withoutadding any parts, the bowed rod taking the place of the usual reach-rod.The bowed rod 14 also serves to take up the lost motion of the controllinkage when the valve is open in the following manner. In fully openingthe steam valve the handle Us is pulled over until the valve 1 seatsupwardly against face 25 and until the bowedv rod 1 1 is sufiicientlystretched or straightened from normal curvature to hold the train oflinkagetight.

The operation of the system is as follows: To set the injector in actionthe final over flow valve V0" is opened. the watervalve the pressure ofthe water, and thence to the final overflow V07. After the flow of wateris thus established the steam valve Vs is further lifted until the lowervalve 3' is opened, whereupon the flow of water is maintained by steamflowing through forcer nozzle FN, The final overflow valve V0 is thenclosed and the water'flows through the delivery passage D to the boiler,the in termediate overflow valve V0" being automatically closed and thecheck valve V 0 being automatically opened by the pressure of the waterin the chamber surroundingthe forcer tube FT. After the injector hasthus been set in action the rate of flow 'may be controlled merely byraising or loweringjthe its I follow the'upper valve for the reason thatthe steam pressure above the valve exceeds the water pressure below. Theopenings 13 are thereby uncovered permitting the steam to flow throughvalve 8 to heat thewater.

.By virtueof the construction of the steam valve and its controlmechanism this valve is opened only a slight amount upon the movement ofthe control handle one full notch. measure at a pressure sufiicient tohold down valve 8 and warm' the water in advance of the water valve butinsuflicient to actuate the annunciator or te ll-tale T. By virtue ofthe construction ofthe water valve and its control mechanism both, partsopen together to supply water to the injector but only the upper partopens to supply-heating steam tothe feed water, the action of; the lowervalve being automatic. And by Vll': tue'of the coordination oftlie steamand 'water valves, these valves function either to control the flow ofwater to the boiler or to control the flow of steam to the feed water,the valves being actuated by the same levers and in the same directionsin each case. The unique arrangement of valves and control mechanismalso makes it possible to throttle the flow of water solely by the steamvalve, the valve commonly employed at the lifter nozzle beingrenderedwholly unnecessary and therefore being eliminated.

The opening of the steam valve such a small amount as to permit steam toflow in sufliciently small measure not to actuate the tell-taleannunciator is rendered possible by the piston 22 telescoping into valveseat 2.

I claim:

1. An injector device comprising a steam valve, a seat therefor, meansfor. lifting said valve from its seat to a predetermined amount, andmeans for permitting the passage of steam in minute quantities onlythrough said valve when so raised.

2. An injector device comprising a'steam valve, an annular valve seathaving a steam passage therethrough, means for lifting said valve fromits seat. and means for obstructing the free flowv of steam through saidpassage during the first stages of opening movement of the valve.

. 3. An injector device comprising a steam valve, an annular seattherefor providing This permits steam to flow in small a cylindricalsteam passagejand a cylindrical piston member secured to said valve andnormally extending into and loosely fitting within said passage.

a spider extending downwardly from said piston, and means carried bysaid spider for supporting'the lower valve member.

5. An in ector devicehavingsteam and water inlet passages, a valve forcontrolling said steam inlet passage, a lever for actuatingsaid valve,and a notched locking sector forsaid lever, said valve comprising anextension member so constructed and arranged that upon moving said leverinto engagementwith the first notch of said sector, steam will bepermitted to bleed past said extension member in predetermined minutequantities. i

6. An injector device having a water inlet passage, an annular valveseat defining suchgpassage, a manually closable main valve membercooperable with said seat for obstructing the flow of watertherethrough,

said valve member having an opening there through, and means engageablewith said valve member for controlling the passage of water through saidopening.

7. An injector device having a water inlet passage, an annular valveseat surrounding the same, a reciprocable main valve member cooperablewith said seat, said valve member having an opening therethrough andbeing constructed and arranged to be lifted from said seat by thepressure of water within the inlet passage, and manually actuable meansoperable to close said opening'in the main valve and to hold the latteragainst its seat.

8. An injector device comprising a water inlet valve having a mainvalvemember engageable with a valve seat, said valve member having a guidestem secured thereto, and means for forcing said main valve to its seatcomprising a rotatable member having a socket for engagement with saidguide stem.

9. An injector device comprising a water inlet valve having a valveseat, a main valve cooperating therewith, said valve having an openingtherein, a guide stem projecting from said valve, a secondary valve forclosing said opening and having a socket for loosely receiving saidguide stem, and manually controllable means for actuating said secondaryvalve.

10. An injector device having steam and water controlling means, saidlatter means comprising an annular valve seat, a main valve diskcooperating therewith, said disk having a series of openingstherethrough surrounding an upstanding guide stud, a secondary valvemember having a socket loosely engaging said stud and a flange forcovering saidropeni'ngs, said valve member beingexternally screwthreaded for engage ment with an internally threaded holder, and means.for rotating said member relatively to its holder.

11. An injector apparatus comprising steam and water inlet valves, saidwater inlet valve comprising a plurality of members movablesimultaneously in the same direction for admitting water, and means formoving one of said members independently of the other to permit thepassageof steam therethrough.

12. An injector apparatus comprising a steam inlet passage, a waterinlet passage, valves for controlling the flow of steam and waterthrough the respective passages, and a lifter nozzle having a free andunobstructed and constantly open entrance.

13. An injector apparatus comprising steam and water controlling valves,an actuating lever for said steam valve, means for locking said lever inadjusted position, and connections between said lever and the steamvalve comprising a reach rod having an interposed flexible portionoflaterally bowed form.

14. In a boiler feeding injector, the combination with a system of steamand water control, of a steam supply closure valve and linkage foractuating same, and a stop arranged to engage said valve when open, saidlinkage including a bowed flexible rod adapted to maintain said linkagetight when the valve is either opened or closed.

15. An injector device comprising a steam inlet valve, lifter and forcernozzles, a pressure controlled water inlet valve, a telltale, and levermeans for controlling said inlet valve, said steam inlet valve being soconstructed and arranged that a predetermined movement of said levermeans serves to admit steam to the injector in sufiicient amount to holdsaid water inlet valve upon its seat but in insufficient amount toactuate the telltale.

16. An injector device comprising a steam inlet valve,a manuallyoperable lever for actuating same, lifter and forcer nozzles, atelltale,-and a pressure operated water inlet valve comprising a diskhaving perforations therein, said steam valve being so constructed andarranged that upon a definite movement of the lever, steam will beadmitted for warming the water in the supply pipe but in insufficientquantity to actuate the telltale.

Signed by me at Boston, Massachusetts, this 5th day of August, 1919.

v BELVIN T. WILLISTON;

